[TASK] Bump version number to 9.1.0

Related: #27318

Author: kanow

composer.json

@@ -54,7 +54,7 @@
       "extension-key": "taskqueue"
     },
 	  "branch-alias":{
-		  "dev-main": "9.1.x-dev"
+		  "dev-main": "9.2.x-dev"
 	  }
   }
 }

ext_emconf.php

@@ -8,7 +8,7 @@
     'author' => 'Eike Starkmann',
     'author_email' => 'starkmann@undkonsorten.com',
     'state' => 'stable',
-    'version' => '9.0.3',
+    'version' => '9.1.0',
     'constraints' => [
         'depends' => [
             'typo3' => '12.4.0-13.99.99',